105095021 has 2 divisors, whose sum is σ = 105095022. Its totient is φ = 105095020.

The previous prime is 105094999. The next prime is 105095033. The reversal of 105095021 is 120590501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 15319396 = 9475^2 + 3914^2 .

It is an emirp because it is prime and its reverse (120590501) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105095021 is a prime.

It is a super-2 number, since 2×105095021² = 22089926877980882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105095041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52547510 + 52547511.

It is an arithmetic number, because the mean of its divisors is an integer number (52547511).

Almost surely, 2^105095021 is an apocalyptic number.

It is an amenable number.

105095021 is a deficient number, since it is larger than the sum of its proper divisors (1).

105095021 is an equidigital number, since it uses as much as digits as its factorization.

105095021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 105095021 is about 10251.5862675003. The cubic root of 105095021 is about 471.9116662355.

The spelling of 105095021 in words is "one hundred five million, ninety-five thousand, twenty-one".